Wrench



NITED STATES EDWIN H. KINSEY, OF

PATENT OFFICE.

BUFFALO, NEW YORK.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 44.5,020, dated January 20, 1891.

Application filed October 27, 1390. Serial No. 369,400. (No model.)

To all whom it may concern.-

Be it known that I, EDWIN HURLB'U'TT KIN- sEY, of Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements on a rench; and I do hereby declare that the following description of my said invention, taken in connection with the accompanying sheet of drawings, forms a full, clear, and exact specification, which will enable others skilled in the art to which itappertains to make and use the same.

This invention has general reference to improvements in pipe-wrenches; and it consists, essentially, in the novel and peculiar combination of parts and details of construction, as hereinafter first fully set forth and described, and then pointed out in the claim.

In the drawings already mentioned, which serve to illustrate my said invention more fully, Figure 1 is a plan of my improved pipewrench. Fig. 2 is a similar view of the same slightly modified. Fig. 3 is a side view of the same, and Fig. 4 a transverse sectional view in line 0c 03 of Fig. 2.

Like parts are designated by corresponding letters of reference in all the figures.

The object of this invention is the production of a simple and efficient pipe-wrench that consists of the smallest number of parts, that can be readily manufactured on the duplicate system, and that can be sold in the market at a very reasonable figure.

To attain these results I construct this wrench of a body A, terminating in a conveniently-formed handle 13 and having on one side a lateral projection C, to which is afiixed or formed in one piece, if so desired, a curved jaw D. This jaw has its inner edge serrated, as shown at E, Figs. 1 and 2, with the serrations or teeth leaning toward the projection C, for the purpose hereinafter to be referred to. This jaw D may, as stated, be formed in one piece with the body A and its projection C, such a construction being shown in Fig. 1; or it may be separately produced and either welded onto the projection D or riveted thereto by rivets d, as illustrated in Fig. 2, the projection D in this case being slotted to form jaws D, between. which a shank on the jaw D fits, as shown in Fig. i, and the rivets passed through the parts in an evident manner.

Upon the body A are formed cylindrical bosses or studs F on directly-opposite points; or a hole may be produced in said body and a stud F passed through the same, if preferred. Upon the projecting ends of this stud are lo cated wheels G G, the peripheries of which are serrated, as shown at g, said wheels being arranged to loosely revolve upon the studs F. They, as well as the jaw D, are produced from cast-steel properly hardened and tempered to resist the wear to the greatest extent. The whole body, with its handle, the projection C, and the jaw D, may be produced entire in the process of forging or casting, thereby reducing the cost of manufacture to the lowest point.

The curved jaw D, which is a segment of a circle, or very nearly so, has its center located at some distance from that of the wheels G G, so that the space H, which receives the pipe, bolt, rod, or similar object to be screwed, is tapering, and thereby causes the wheels to force the same tightly against the teeth of the jaw, which, being inclined in the proper direction, will grasp the pipe, &c., securely and enable it to be revolved when the device is turned in the right direction, while as soon as it is turned in the opposite way it will at once and readily disengage from the pipe or red and release the same, it being a fact that this device will more readily release than any other pipe-wrench of this class with which I am acquainted.

In order to prevent the wheels G G from leaving the studs F, the latter are slightly upset at f, which will not interfere with their removal in case of breakage and their renewal when necessary. It will now be observed that the wheels G G, beingjournaled on both sides of the body A and of even diameter, will receive the strain upon them equally, thereby avoiding all binding and making the operation of the implement a very perfect and posi= tive one.

Having thus fully described my invention, I claim as new and desire to secure to me by Letters Patent of the United States- As an improved article of manufacture, a in testimony that I claim the foregoing as pipe and bolt Wrench consisting of the body my invention I have hereto set my hand in IQ A, having the handle B formed thereon, the the presence of two subscribing witnesses. lateral projection O on said body, the curved r T T- 5 serrated jaw D on said projection, the studs km F on said body, and the Wheels G G, jour- Attest: nailed upon said studs on both sides of the MICHAEL J. STARK, body, as and for the purpose set forth. WM. 0. STARK. 

